213869745 has 24 divisors (see below), whose sum is σ = 379332096. Its totient is φ = 111410208.

The previous prime is 213869723. The next prime is 213869753. The reversal of 213869745 is 547968312.

It is not a de Polignac number, because 213869745 - 2¹¹ = 213867697 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 213869745.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53329 + ... + 57198.

It is an arithmetic number, because the mean of its divisors is an integer number (15805504).

Almost surely, 2^213869745 is an apocalyptic number.

It is an amenable number.

213869745 is a deficient number, since it is larger than the sum of its proper divisors (165462351).

213869745 is a wasteful number, since it uses less digits than its factorization.

213869745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110581 (or 110578 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 213869745 is about 14624.2861364239. The cubic root of 213869745 is about 598.0210215837.

The spelling of 213869745 in words is "two hundred thirteen million, eight hundred sixty-nine thousand, seven hundred forty-five".